How to use array modifier with follow path constraint (Cableway Chairs)
A simple Array modifier will deform your object, so you can use 2 methods:

With Follow Path constraint:


Give your chair a Follow Path constraint.
Duplicate your object with AltD (linked duplication), and press Enter so that the copy stays at the exact same position.
Play with the constraint Offset value to place the copy before or after the original object.


With Duplifaces:


Create a curve. Put its origin to its beginning point to make it easier.
Create a plane at the exact same point. This plane will be used as a base for your chair.
Apply the curve and the plane scales.
Give the plane an Array modifier, choose Constant Offset or the Relative Offset value, choose the Count value.
Give the plane a Curve modifier with the curve as Object. The plane should be duplicated along the curve.
Keep the plane selected and in the Properties panel > Object > Instancing, activate Faces.
Parent the chair object to the plane, the chair should be duplicated on the planes.
If you want the chair to stay vertical along the curve, create a single vertex instead of a plane.
To animate, move the plane on the right axis.